AHRS refers to the Attitude Reference System, which includes multiple axial sensors that provide heading, roll and rollover information for the aircraft. These systems are used to provide accurate and reliable attitude and navigation information for the aircraft. The attitude reference system includes MEMS-based three-axis gyroscopes, accelerometers and magnetometers. The difference between the attitude reference system and the inertial measurement unit IMU is that the attitude reference system (AHRS) contains embedded attitude data solving unit and heading information. The inertial measurement unit (IMU) only provides sensor data and does not provide accurate information. Reliable posture data function. The current attitude solving unit of the multi-sensor data fusion used in the currently used azimuth reference system (AHRS) is a Kalman filter.

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